Outlook's Restore Window button doesn't work?

Close Outlook then open the registry editor. Find and delete the values atHKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook\Office Explorer where xx is your version of Outlook. Delete Frame , and if you have one for Namespaces, delete it as well. When you restart Outlook, it will open at full screen. Resize the window as desired.

HKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook\Office Explorer
REG_BINARY: Frame
REG_BINARY: Namespaces

Configure Outlook XP/2003/2007 to Prompt for a Password

In order to configure Outlook to always prompt you for your credentials before opening your mailbox perform the following steps:

1. Start Outlook.
2. From the Tools menu, select E-mail Accounts.
3. Select the View or Change Existing E-mail Accounts option.
4. Click Next.
5. Select your Exchange server.

Note: If prompted, in the Password text box, type your password.

1. Click the More Settings button.
2. Set your network security level:

Place a check in the Always Prompt for User Name and Password check box.